Thermostatic trap.



No. 634,538. 1 Patented um. lo, |899. .L F. mcELnov'. THERMDSTATIG TRAP. .v

(Appxicmon med :my 9, 189s.)

' z sheets-sheet l.

(No Model.)

lll/lll /itq 5555.5

mms mens co. vnmculmu..w^smusrou, n. a

No. 634,538. Patented 0st. l0; |899.

J. F. McELnoY.

rHEnmosTATlc TRAP. A (Appummn med :my s, 189s.)

(No Model.) 2 Sheets-Sheet 2l Y SEI-:.-- l w gl LF! pq' im I LL f7- mi 5555574 l \/5 it? Ame.

rn: mms mans co, mnroumo.. wnsnmsfow, a c,

i UNITED STATES *PATENT OFFCF.

JAMES' F. MCELROY, o F ALBANY, rnrvvA YORK, Assicnon 'ro THF" consom- DA'IIED CAR-HETINGCOMPANY, OF SAME PLACE.`

f rHERMosTATIc TRAP.

Y .SPECIFICATION forming part of Letters Patent o. 634,538, dated October 10, 1899.

Application filed .Tilly 9, 18.98: Serial No. 685,483. (No model.)

Be it known that I, JAMES F. MoELRoY, a citizen of the United States of America, and a resident ofy Albany, in the county of Al bany and State of New York,'have invented the mechanism illustrated in the accom pany Fig. 3.

ing drawings, in Which- `Figure l is a plan alongV the lines a; on Fig. 2 is-'a section along the lines 'zz on Fig. 3. Fig. v3 is a ,vertical section'. Fig. 4 is an elevatioinand' Fig. 5 is a perspec tive View of the piping of a Water-circulating system.

throughout the 'severalvie'ws Similar characters refer to similarpnrts A represents the Water-circulating pipes; B, the coil of a Water-heater; C, .the expansion-drum;v D, a steamheated drum usually arranged beneath the door of the'car.

E is a" train-pipe carrying steamV to the drumD; y

F is a valve adapted to be operated Within the car, controlling the admission of steam to the drum D.-

G is a discharge-pipe'allowing,the Water of ycondensation to escape into thetrap K. The i trap K is provided with a sediment-chamber V, into which the discharge from the drum enters by means of the pipe G, which connects into the trap through the port c. The blo\v.

' off pipe V2 is arranged in said chamber V' and controlled 'by'means of the valve V3. Communicating with the chamber V" is a chamber W Within thef trap K. Between the chamber W and the sediment-chamber V', I arrange a screen or perforated bonnet fu" in such a mannerthat the sediment contained`v in the wat-er entering the sediment-chamber V will be prevented from passing 'into the chamber NV. lVithin the chamber W, I arrange a stem L, adapted to operate against the tension of the spring S on said stem, said stem guided by projecting into the recess X. On oneA end'ofv then stem ris .arranged a disk valve L', preferably provided with a gasket j', adapted to engage with the valve-seat j.

1lhe lower surface of the disk'valvc is preferabl y saucer-shaped to allor fortheengage- Vment thereof with the vproject-ion L2 onthe spider M. In order to provide for guiding the disk valve L', I arrangea series of lugs j?, secured to the fitting containing the valveseat j. v

The lower portion of the trap K is provided with a hinged joint R in such a mannerthat the trap may be opened,and for the purpose ofsecuring it togetherlarrange a lock RC By this-means the thermostatic cell N may be taken out when desired and the Vspiders re-V moved and replaced when necessary. In or d er to insure the adjustment of Athe thermos static cell N, l-place a bolt n through the bottom of the trap, which bolt engages With the spider O, supporting the thermostatic cell. YThe bolt n isarran-ged to mesh Withy threads f in the ease of the tra-p and provided with a nutn on the outside of the casing. The ther- `in ostatic cell is preferably' 'constructed of yspring linet-Val', and the spiders M and O are preferably arranged in reference to the thermostatic cell in such a manner that the spiders come incontact with' theocell at their centers only. The lower portion of the trap is provided' with openings P, allowing for lthe free circulation of air beneath the spidersholding the thermostatic cell and also for the discharge of Water from' the trap. The ther- `mostatic cell contains a liquid whose boilingreaches about 180 Fahrenheit. the thermostatie cell will be 1aised,'.whichwill raise the valve L' against the seat j. W'hen the liquid in the thermostatic cell is below itsy expansive point,the spring S on the stern L will open the valve. The trap vbeing in contact with the discharge-pipe Gof the" steamjdrum is -inhot metallic connection to such an extent that the. Water contained inthe trap is kept Idov above the freezingpoint. At the same time the temperature is so arranged by means of the adjustment of the parts of the trap that the thermostatic cell is not affected to any appreciable extent by the hot metallic connection with the drum.

The operation of my system is simple and apparent. By means of the metallic connection with the drum I prevent any possibility of the trap becoming inoperative because of freezing, since the drum is of course always Warm. The discharge from the pipe Gr is received Within the sediment-chamber Vuntil the water percolates through the screen o into the overIlow-chamber IV, Where it is discharged and passes out through the openings P in the bottom of the trap. When hot Water or steam passes into the overflow-chamber, the thermostatic cell becoming heated causes the valve to close, preventing further discharge from the pipe. W'hen the sedimentbasin V has become filled or it is desired to clean it out or blow off the contents for any reason, the valve V3 is operated, allowing a discharge through the blow-oit pipe V2. By means of the plug 10, which is arranged to engage With threads in the casting at the side of the sediment basin or chamber, an opening may be obtained into the sediment-chamber through which the bonnet c may be placed lin position or taken out when desired. It will be noticed that the sedim ent contained in the discharge entering the trap is prevented from coming in contact With the thermostatic cell, it being deposited in the sediment-basin. The trap K being made in a single casting containingboth the sediment-chamber and the overiloW-chamber, as Well as the trap operated by the thermostatic cell, it is apparent that there can be no freezing in the trap operated by the thermostatic cell so long as there is Warm Water in the sediment-chamber` or so long as heat is applied in any manner to the casting.

In this trap I do away with some of the parts described in my application for Letters Patent oncar-heating systems, filed January 6, 1898, Serial No. 665,796, and arrange for a more compact device which, as has been said before, is preivented from freezing because of 'ing, said casing containing a sediment-chamber, an overflow-chamber, a screen placed in the port communicating between said sediment chamber and said overiioW-chamber, a springactuated valve in said overiiowchamber, a thermostatic cell adapted to close said valve against the tension of said spring, with a blow-oit pipe located in said sediment-chamber, substantially as described.

3. In athermostatic trap, a casing adapted to be connected to a car-heating system, a sediment-chamber in said casing into which the discharge from said car-heatingsystem passes, a screen placed in a port comm-uniyeating between said sediment-chamber and an overflow-chamber, also located in said casing, a valve in said overiioW-chamber, a thermostatic cell adapted to close said valve and a means for opening saidsediment-chamber and removing said screen when desired, substantially as described.

4. In a thermostatic trap, adapted to be connected to a railway-car-heating system, a casing containing a sediment-chamber and an overflow-chamber, with a' thermostatic cell and a valve adapted to be closed by said thermostatic cell, a drum and metallic connections between said casing and. said drum, substantially as described. y

Signed by me at Albany, New York, this 6th day of July, 1898.

JAMES F. MOELROY.

IVitnesses:

W. S. MORRISON, CHAS. B. MITCHELL. 

